if the Enhance Weapons(Spell Warrior) can be use for natural weapon？

[SlimGauge]

Do you mean the "Enhance Weapons(Su)" option for the "Weapon Song(Su)" raging song granted by the Spell Warrior Skald archetype from the Advanced Class Guide ?

[Imbicatus]

Generally, natural weapons are weapons and any effects that enchance weapons can apply to them, with the exception of effects that are limited to manufactured weapons. Since weapon song doesn't specify manufactured weapons, it applies.

[Imbicatus]

It can be natural weapons. If you make an attack with a claw, you are wielding it.

[Rysky]

Yep.